// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef V8_INTL_SUPPORT
#error Internationalization is expected to be enabled.
#endif // V8_INTL_SUPPORT

#ifndef V8_OBJECTS_JS_PLURAL_RULES_H_
#define V8_OBJECTS_JS_PLURAL_RULES_H_

#include <set>
#include <string>

#include "src/heap/factory.h"
#include "src/isolate.h"
#include "src/objects.h"
#include "src/objects/intl-objects.h"
#include "src/objects/managed.h"

// Has to be the last include (doesn't have include guards):
#include "src/objects/object-macros.h"

namespace U_ICU_NAMESPACE {
class PluralRules;
} //  namespace U_ICU_NAMESPACE

namespace v8 {
namespace internal {

    class JSPluralRules : public JSObject {
    public:
        V8_WARN_UNUSED_RESULT static MaybeHandle<JSPluralRules> Initialize(
            Isolate* isolate, Handle<JSPluralRules> plural_rules,
            Handle<Object> locales, Handle<Object> options);

        static Handle<JSObject> ResolvedOptions(Isolate* isolate,
            Handle<JSPluralRules> plural_rules);

        V8_WARN_UNUSED_RESULT static MaybeHandle<String> ResolvePlural(
            Isolate* isolate, Handle<JSPluralRules> plural_rules, double number);

        V8_EXPORT_PRIVATE static const std::set<std::string>& GetAvailableLocales();

        // [[Type]] is one of the values "cardinal" or "ordinal",
        // identifying the plural rules used.
        enum class Type {
            CARDINAL,
            ORDINAL,

            COUNT
        };
        inline void set_type(Type type);
        inline Type type() const;

        Handle<String> TypeAsString() const;

        DECL_CAST(JSPluralRules)
        DECL_PRINTER(JSPluralRules)
        DECL_VERIFIER(JSPluralRules)

// Bit positions in |flags|.
#define FLAGS_BIT_FIELDS(V, _) V(TypeBits, Type, 1, _)

        DEFINE_BIT_FIELDS(FLAGS_BIT_FIELDS)
#undef FLAGS_BIT_FIELDS

        STATIC_ASSERT(Type::CARDINAL <= TypeBits::kMax);
        STATIC_ASSERT(Type::ORDINAL <= TypeBits::kMax);

// Layout description.
#define JS_PLURAL_RULES_FIELDS(V)           \
    V(kLocaleOffset, kTaggedSize)           \
    V(kFlagsOffset, kTaggedSize)            \
    V(kICUPluralRulesOffset, kTaggedSize)   \
    V(kICUDecimalFormatOffset, kTaggedSize) \
    /* Total size. */                       \
    V(kSize, 0)

        DEFINE_FIELD_OFFSET_CONSTANTS(JSObject::kHeaderSize, JS_PLURAL_RULES_FIELDS)
#undef JS_PLURAL_RULES_FIELDS

        DECL_ACCESSORS(locale, String)
        DECL_INT_ACCESSORS(flags)
        DECL_ACCESSORS(icu_plural_rules, Managed<icu::PluralRules>)
        DECL_ACCESSORS(icu_decimal_format, Managed<icu::DecimalFormat>)

        OBJECT_CONSTRUCTORS(JSPluralRules, JSObject);
    };

} // namespace internal
} // namespace v8

#include "src/objects/object-macros-undef.h"

#endif // V8_OBJECTS_JS_PLURAL_RULES_H_
